Belgravia Basement
GRADE II LISTED BUILDING, LONDON SW1W
PROJECT OVERVIEW
Beneath one of Belgravia’s most distinguished terraces, a complete world reveals itself — a subterranean sanctuary conceived entirely in natural materials, where light, stone, and water enter into quiet dialogue.
Working within a Grade II Listed building in the heart of Belgravia required a depth of expertise that extends well beyond design. From the earliest stages, T&V Architects led the project across all its dimensions: architectural conception, technical construction knowledge, Listed Building Consent, planning applications, and the careful negotiation of party wall agreements with the appointed surveyors. Every decision was made with equal regard for the building’s historic fabric and the client’s desire for a contemporary, serene retreat.
MATERIALS & PALETTE
The material palette was chosen for its depth and sensory richness. Sandblasted travertine — warm, textured, geological — covers floors and pool surrounds with a softness that invites touch. The same stone appears in the bathroom, where a carved travertine basin sits as a monolithic object, grounded and elemental.
Walls throughout the wet areas are finished in tadelakt, an ancient lime plaster applied in sweeping, burnished layers. Its waterproof surface takes on a luminous quality under carefully directed light, shifting from pale sand to deep ivory depending on the hour and the mood of the space.
Against this warm neutrality, the swimming pool asserts itself with colour. The vessel is lined entirely in turquoise glass mosaic, each small tessera catching and refracting light through the water. The combination of vivid teal mosaic and pale travertine surround creates a chromatic contrast of exceptional clarity — a composition at once contemporary and timeless.
LIGHT & ATMOSPHERE —
Designing with Light
Lighting was conceived as a design element in its own right, capable of transforming the atmosphere of each space according to the moment. Above the pool, hundreds of miniature LED points are set into a deep, dark ceiling — creating a mood of stillness and quiet intimacy that shifts the room entirely after dark.
When a brighter, more vital quality is desired, technologically advanced backlit panels activate, engineered specifically for high-humidity environments. These panels emit a broad, even spectrum that closely mirrors natural daylight, lending the pool area a sense of genuine luminosity that conventional sources cannot achieve.
Throughout, light was deployed to emphasise the architecture itself: coves of concealed strip lighting trace the meeting of wall and ceiling, sharpening the geometry of the space. The acoustically insulated ceiling absorbs sound as readily as it absorbs shadow — making the entire basement feel profoundly, privately quiet.
DETAIL & CRAFT —
Considered at Every Scale
The shower is framed by a full-height arched opening finished in tadelakt — an architectural gesture of quiet authority, entirely seamless. Integrated within its enclosure, a recessed niche for towels is lit from within, its shelves appearing to float in ambient light. No visible fixtures, no interruption to the surface plane.
In the bathroom, a carved travertine basin emerges from its plinth, bearing the same geological patterning as the floors below. The brass tapware — wall-mounted and sculptural — completes a composition of material harmony: stone, plaster, metal, each element resolved with care.
The staircase descending into the basement was designed as a considered transition between two domestic worlds. Treads are clad in the same timber used throughout the main house, maintaining material continuity. The handrail — entirely bespoke — is fabricated in brushed brass: a flat, rectangular profile of quiet elegance, mounted on hand-turned brackets that cast long, warm shadows against the tadelakt wall.
SCULPTURAL STONE —
The Travertine Stair
The steps descending into the pool carry their own sculptural authority: monolithic, thick, unhurried. Carved entirely from sandblasted travertine, their geometry is revealed by light raking across the stone’s open pores and fossilised traces — a surface ancient and contemporary at once.
It is the kind of detail that rewards proximity. The closer one approaches, the more the material speaks — of time, of depth, of an architecture that trusts the beauty of natural things.
IN CONCLUSION —
A Place of Beauty, Stillness, and Quiet Luxury
At its heart, this project is a pool — but a pool of a very particular kind. Its water shimmers in turquoise and light; its stone surround is cool, solid, enduring; its atmosphere shifts from intimate evening calm to the clarity of bright, natural-feeling day. It is a space designed not merely for swimming but for inhabiting — for the particular pleasure of being below ground, insulated from the city above, suspended in warmth and silence.
The result is a testament to what becomes possible when architecture, craft, and technical mastery converge around a single vision: a home made richer, and more beautiful, by what lies beneath it.